Read MYSQL with WebDynpro

Question

Hello Experts,
i want to read data from a mySQL Database with WebDynpro. If i write a java programm to do this it works perfectly, but if I use this Java code in my WebDynpro Application it doesn't work.
So how can I run this code in my WebDynpro-project:
String Query = null;
java.sql.Connection con = null;
java.sql.Statement stmt = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver");
catch (ClassNotFoundException e) {
e.printStackTrace();
System.exit(1);
System.out.println(time.toString());
System.out.println(time);
try {
con =
DriverManager.getConnection(
"jdbc:mysql://server.com",
"user",
"password");
stmt = con.createStatement();
rs = stmt.executeQuery("USE database");
rs = stmt.executeQuery("SELECT * FROM table");
while (rs.next()) {
System.out.print(rs.getString(6));
System.out.print(" --- " + rs.getString(7));
System.out.print(" --- " + rs.getString(8));
System.out.println(" --- " + rs.getString(9));
con.close();
rs.close();
stmt.close();
catch (SQLException e5) {
e5.printStackTrace();
Thanks!

Answer 1

HI johannes,
            Web dynpro application should follow some coding rules,
The following lines are not accepted by web dynpro
you first go through the web dynpro documentaions
e.printStackTrace();
System.exit(1);
System.out.println(time.toString());
System.out.println(time);
System.out.print(rs.getString(6));
System.out.print(" --- " + rs.getString(7));
System.out.print(" --- " + rs.getString(8));
System.out.println(" --- " + rs.getString(9));
e5.printStackTrace();
in webdynpro replace following
system.out.println()----
>wdComponentAPI.getMessageManager().reportSuccess()
To start with WD Java, the following tutorial wil be helpfiul
http://help.sap.com/saphelp_nw04/helpdata/en/f8/bdfe80d9a3b048a5fb32a7d149774e/frameset.htm
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/49f2ea90-0201-0010-ce8e-de18b94aee2d#20
To know about Web Dynpro UI Element Reference Guide
http://help.sap.com/saphelp_nw04/helpdata/en/5c/1b76bc3da0504e8b535cf3e154eaa7/frameset.htm
please go to following url,
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/49f2ea90-0201-0010-ce8e-de18b94aee2d#20
there is lot of basic tutorials is there. please go throught it
Refer these links
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/web%20dynpro%20tutorial%20and%20sample%20applications.faq
What is Web Dynpro? What is Web Dynpro?
Why WebDynpro ? Why WebDynpro ?
Why  webdynpro and not BSP or JSP? Why webdynpro and not BSP or JSP?
BSP to WEB Dynpro BSP to WEB Dynpro
Benifits of using Webdynpro Benifits of using Webdynpro
Java vs. ABAP WEbDynpro Java vs. WebDynpro ABAP
regarding Java related webdynpro regarding Java related webdynpro
Web Dynpro vs. Struts - a few questions Web Dynpro vs. Struts - a few questions
What kind of applications are being developed with Web Dynpro? What kind of applications are being developed with Web Dynpro?
Check this:
http://www.sappro.com/downloads/OptionComparison.pdf
Refer these links
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/web%20dynpro%20tutorial%20and%20sample%20applications.faq
What is Web Dynpro?
Why WebDynpro ?
Why  webdynpro and not BSP or JSP?
BSP to WEB Dynpro
Benifits of using Webdynpro
Java vs. ABAP
regarding Java related webdynpro regarding Java related webdynpro
Web Dynpro vs. Struts - a few questions
What kind of applications are being developed with Web Dynpro?
Regards,
P.Manivannan